add mailgun test

.gitignore

@@ -1,3 +1,5 @@
+.env
+
 /public-jwks
 /go-mockid
 

cmd/mailer/mailer.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+	"time"
+
+	mailgun "github.com/mailgun/mailgun-go/v3"
+
+	_ "github.com/joho/godotenv/autoload"
+)
+
+func main() {
+	/*
+	  MAILGUN_API_KEY=key-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+	  MAILGUN_DOMAIN=mail.example.com
+	  MAILGUN_FROM="Rob the Robot <rob.the.robot@mail.example.com>"
+	*/
+
+	to := flag.String("to", "", "message recipient in the format of 'John Doe <john@example.com>'")
+	replyTo := flag.String("reply-to", "", "reply-to in the format of 'John Doe <john@example.com>'")
+	subject := flag.String("subject", "Test Subject", "the utf8-encoded subject of the email")
+	text := flag.String(
+		"text",
+		"Testing some Mailgun awesomeness!",
+		"the body of the email as utf8-encoded plain-text format",
+	)
+	flag.Parse()
+
+	if 0 == len(*to) {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	domain := os.Getenv("MAILGUN_DOMAIN")
+	apiKey := os.Getenv("MAILGUN_API_KEY")
+	from := os.Getenv("MAILGUN_FROM")
+
+	if 0 == len(*text) {
+		*text = "Testing some Mailgun awesomeness!"
+	}
+
+	msgId, err := SendSimpleMessage(domain, apiKey, *to, from, *subject, *text, *replyTo)
+	if nil != err {
+		panic(err)
+	}
+	fmt.Printf("Queued with Message ID %q\n", msgId)
+}
+
+func SendSimpleMessage(domain, apiKey, to, from, subject, text, replyTo string) (string, error) {
+	mg := mailgun.NewMailgun(domain, apiKey)
+	m := mg.NewMessage(from, subject, text, to)
+	if 0 != len(replyTo) {
+		// mailgun's required "h:" prefix is added by the library
+		m.AddHeader("Reply-To", replyTo)
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
+	defer cancel()
+
+	_, id, err := mg.Send(ctx, m)
+	return id, err
+}

go.mod

@@ -5,4 +5,5 @@ go 1.13
 require (
 	git.rootprojects.org/root/keypairs v0.5.2
 	github.com/joho/godotenv v1.3.0
+	github.com/mailgun/mailgun-go/v3 v3.6.4
 )

go.sum

@@ -1,4 +1,18 @@
 git.rootprojects.org/root/keypairs v0.5.2 h1:jr+drUUm/REaCDJTl5gT3kF2PwlXygcLsBZlqoKTZZw=
 git.rootprojects.org/root/keypairs v0.5.2/go.mod h1:WGI8PadOp+4LjUuI+wNlSwcJwFtY8L9XuNjuO3213HA=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/facebookgo/ensure v0.0.0-20160127193407-b4ab57deab51/go.mod h1:Yg+htXGokKKdzcwhuNDwVvN+uBxDGXJ7G/VN1d8fa64=
+github.com/facebookgo/stack v0.0.0-20160209184415-751773369052/go.mod h1:UbMTZqLaRiH3MsBH8va0n7s1pQYcu3uTb8G4tygF4Zg=
+github.com/facebookgo/subset v0.0.0-20150612182917-8dac2c3c4870/go.mod h1:5tD+neXqOorC30/tWg0LCSkrqj/AR6gu8yY8/fpw1q0=
+github.com/go-chi/chi v4.0.0+incompatible h1:SiLLEDyAkqNnw+T/uDTf3aFB9T4FTrwMpuYrgaRcnW4=
+github.com/go-chi/chi v4.0.0+incompatible/go.mod h1:eB3wogJHnLi3x/kFX2A+IbTBlXxmMeXJVKy9tTv1XzQ=
 github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
 github.com/joho/godotenv v1.3.0/go.mod h1:7hK45KPybAkOC6peb+G5yklZfMxEjkZhHbwpqxOKXbg=
+github.com/mailgun/mailgun-go v1.1.1 h1:mjMcm4qz+SbjAYbGJ6DKROViKtO5S0YjpuOUxQfdr2A=
+github.com/mailgun/mailgun-go v2.0.0+incompatible h1:0FoRHWwMUctnd8KIR3vtZbqdfjpIMxOZgcSa51s8F8o=
+github.com/mailgun/mailgun-go/v3 v3.6.4 h1:+cvbZRgLSHivbz/w1iWLmxVl6Bqf4geD2D7QMj4+8PE=
+github.com/mailgun/mailgun-go/v3 v3.6.4/go.mod h1:ZjVnH8S0dR2BLjvkZc/rxwerdcirzlA12LQDuGAadR0=
+github.com/mailru/easyjson v0.0.0-20180823135443-60711f1a8329 h1:2gxZ0XQIU/5z3Z3bUBu+FXuk2pFbkN6tcwi/pjyaDic=
+github.com/mailru/easyjson v0.0.0-20180823135443-60711f1a8329/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=